CN104852270B - Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating - Google Patents
Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating Download PDFInfo
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- CN104852270B CN104852270B CN201510227768.7A CN201510227768A CN104852270B CN 104852270 B CN104852270 B CN 104852270B CN 201510227768 A CN201510227768 A CN 201510227768A CN 104852270 B CN104852270 B CN 104852270B
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Abstract
The invention discloses a kind of dual wavelength narrow cable and wide optical fiber lasers based on overlapping grating and chirp grating, including pumping source, dual wavelength to be overlapped grating, Er-doped fiber, chirp grating, spectrometer and answer apparatus for adjusting force.The present invention is using overlapping grating and chirp grating as wavelength selecting device, and structure is simple, it can be achieved that dual-wavelength laser output, uses spectroanalysis instrument to measure its output spectrum minimum wavelength resolution ratio as 0.01nm.It is overlapped grating and chirp grating constitutes resonant cavity, junction loss is small, and parameter adjustment is flexible.Whole device compact structure is reliable, has huge application potential at the integrated aspect of fibre system.
Description
Technical field
The present invention relates to a kind of fiber-grating laser manufacture technology fields, in particular to a kind of based on overlapping grating and Zhou
It sings the dual wavelength narrow cable and wide optical fiber laser of grating.
Background technique
Overlapping grating is a kind of important optical element, and the light of more different wave lengths can be accommodated on the same position of optical fiber
Fine grating, saves space, and stability is good.A kind of wavelength selecting device as novel optical fiber laser is, it can be achieved that wavelength
It quick and precisely selects, keeps entire laser output wavelength more stable, manufacturing process is simpler, and structure is more compact, more passes through
Ji.There is wide application prospect in fields such as DWDM optical fiber telecommunications system, Fibre Optical Sensor, optical device and radars.
At present it has been proposed that a variety of methods for realizing dual wavelength narrow cable and wide optical fiber lasers, but existing defect
Be: output laser is unstable, laser structure is complicated, laser volume is big, output laser linewidth is wider etc., hinders dual wavelength
The development of narrow cable and wide optical fiber laser.
Summary of the invention
The present invention overcomes deficiencies in the prior art, it is desirable to provide the base that a kind of structure is simple, performance is stable, at low cost
In the dual wavelength narrow cable and wide optical fiber laser of overlapping grating and chirp grating, to overcome existing dual wavelength narrow cable and wide optical fiber laser
There are the shortcomings that.
For the above problem existing for existing dual wavelength narrow linewidth laser, the present invention provides a kind of compact-sized, bodies
The dual wavelength narrow linewidth optical fiber that product is small and exquisite, ambient stable work, output performance are reliably based on overlapping grating and chirp grating swashs
Light device.
In order to solve above-mentioned technical problem, the present invention is realized by following technical solution:
A kind of dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating, including pumping source, dual wavelength
It is overlapped grating, Er-doped fiber, chirp grating, spectrometer and answers apparatus for adjusting force；The peak value of the dual wavelength overlapping grating is anti-
The rate of penetrating is above 99%, and peak wavelength is respectively λ1And λ2, the wavelength interval between two gratings is sub-nanometer magnitude；Described
Chirped grating reflection wave band covers λ1To λ 2, and when passing through inscription, spectrum assignment realizes that wavelength X 1 is recessed to there are reflectivity between λ 2
It falls into；One end of the dual wavelength overlapping grating is connected directly with pumping source, and the other end is connected with the Er-doped fiber；Institute
The one end for the chirp grating stated is connected with Er-doped fiber, and the other end is that output end is connected to spectrometer；The dual wavelength weight
Folded grating and the chirp grating constitute the resonant cavity of laser, which is linear cavity；The dual wavelength is overlapped light
Grid and the chirp grating realize the wavelength selection of laser；The dual wavelength is overlapped method of the grating by UV mask,
Multiple exposure is prepared on optical fiber same position；When the chirp grating passes through inscription spectrum assignment realize wavelength X 1 to
There are reflectivity recess between λ 2；The stress that the chirp grating is applied on chirp grating by control adjusts laser cavity
Interior gain realizes the gain balance of dual wavelength and stablizes lasing；The Er-doped fiber realizes the amplification of laser；Described mixes
The doping concentration and Er-doped fiber length of erbium optical fiber are adjustable；
The chirp grating both ends are equipped with and answer apparatus for adjusting force；Connection is all made of single mode optical fiber welding between device；
The pumping source is 980nm LD, peak power output 750mW；The Er-doped fiber is mixed for high concentration
Erbium optical fiber is as gain fibre；The optical fiber laser output spectrum minimum wavelength resolution ratio is 0.01nm.
A kind of dual wavelength narrow cable and wide optical fiber laser laser based on overlapping grating and chirp grating of the present invention exports laser
Process:
1. pumping source, dual wavelength overlapping grating, Er-doped fiber and chirp grating are sequentially ingressed into Optical Maser System；
2. opening pumping source, the output power of pumping source is gradually increased until inspiring laser, is observed by spectrometer defeated
Spectrum out；
3. adjusting cavity loss by gain balance technology and making the gain at starting of oscillation wavelength equal with loss, thus real
Now multi-wavelength oscillation at room temperature.
Due to the adoption of the above technical scheme, a kind of dual wavelength based on overlapping grating and chirp grating provided by the invention is narrow
Line width optical fiber laser, have compared with prior art it is such the utility model has the advantages that
For the present invention using dual wavelength overlapping grating and chirp grating as wavelength selecting device, structure is simple, it can be achieved that double
Wavelength laser output, uses spectroanalysis instrument to measure its output spectrum minimum wavelength resolution ratio as 0.01nm.Dual wavelength is overlapped light
Grid and chirp grating constitute resonant cavity, and junction loss is small, and parameter adjustment is flexible.Whole device compact structure is reliable, in optical fiber system
The integrated aspect of system has huge application potential.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of laser of the present invention；
Fig. 2 is the reflectance spectrum that dual wavelength of the present invention is overlapped grating；
Fig. 3 is the reflectance spectrum of chirp grating of the present invention；
Fig. 4 is that the present invention stablizes twin wavelength laser output spectrogram.
In figure, 1: pumping source；2: dual wavelength is overlapped grating；3: Er-doped fiber；4: chirp grating；5: spectrometer；6: stress
Regulating device.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
A kind of dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating, structural schematic diagram such as Fig. 1
Shown, it includes pumping source 1, dual wavelength overlapping grating 2, Er-doped fiber 3, chirp grating 4, spectrometer 5 and answers apparatus for adjusting force
6；The peak reflectivity of the described dual wavelength overlapping grating 2 is above 99%, and peak wavelength is respectively λ 1 and λ 2, two gratings it
Between wavelength interval be sub-nanometer magnitude；4 reflected waveband of chirp grating covers λ 1 to λ2, and exposure control when passing through inscription
System realizes wavelength X1To λ2Between there are reflectivity recess；One end of the dual wavelength overlapping grating 2 and the direct phase of pumping source 1
Even, the other end is connected with the Er-doped fiber 3；One end of the chirp grating 4 is connected with Er-doped fiber 3, another
End is that output end is connected to spectrometer 5；The dual wavelength overlapping grating 2 and the chirp grating 4 constitute the humorous of laser
Shake chamber, which is linear cavity；The dual wavelength overlapping grating 2 and the chirp grating 4 realize the wavelength choosing of laser
It selects；The dual wavelength is overlapped method of the grating 2 by UV mask, and multiple exposure is prepared on optical fiber same position；
Spectrum assignment realizes wavelength X 1 to λ when the chirp grating 4 passes through inscription2Between there are reflectivity recess；The chirp
Grating 4 adjusts the gain in laser cavity by the stress that is applied on chirp grating of control, realize dual wavelength gain balance and
Stablize lasing；The Er-doped fiber 3 realizes the amplification of laser；The doping concentration and Er-doped fiber length of the Er-doped fiber 3
It is adjustable；
4 both ends of chirp grating are equipped with and answer apparatus for adjusting force 6；Connection is all made of single mode optical fiber welding between device；
The pumping source 1 is 980nm LD, peak power output 750mW；The Er-doped fiber 3 is high concentration
Er-doped fiber is as gain fibre；The optical fiber laser output spectrum minimum wavelength resolution ratio is 0.01nm.
The process of present invention output laser are as follows:
Step 1: in laser structure schematic diagram shown in Fig. 1, the both ends difference welding dual wavelength overlapping of Er-doped fiber 3
Grating 2 and chirp grating 4 constitute the resonant cavity of dual wavelength fibre laser, and the pumping source 1 that central wavelength is 980nm is from dual wavelength
It is overlapped the other end input of grating 2, the other end of chirp grating 4 is the output end of laser, is connected to spectrometer 5, test output
Spectrum.Wherein, the reflectance spectrum difference of dual wavelength overlapping grating 2 and chirp grating 4 is as shown in Figures 2 and 3.
Step 2: opening pumping source 1, the light that pumping source 1 issues is overlapped grating 2 by dual wavelength and is coupled into resonant cavity, so
Light is overlapped constantly reflection in the resonant cavity that grating 2 and chirp grating 4 form in dual wavelength and obtains gain afterwards, when continuous in resonant cavity
When the gain of the light of reflection is greater than loss, laser is generated.
Step 3: in stress application system shown in Fig. 1, adjusting counterweight, accurate control is applied to be recessed with reflectivity
4 two sides of chirp grating stress, resonant cavity is reached by Chong Die with dual wavelength 2 wavelength reflection of the grating matching of chirp grating 4
The gain balance of interior two different wave length laser, it is final to realize that dual-wavelength laser is emitted at room temperature.Swashed by what spectrometer observed
Light output spectrogram is as shown in figure 4, wherein optical maser wavelength is respectively 1556.872nm and 1557.000nm.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology it will be appreciated that originally
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, and all Spirit Essences according to the present invention are made
Equivalent change or modification, should be covered by the scope of protection of the present invention.
Claims (1)
1. a kind of dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating, it is characterised in that: it includes pump
Pu source, dual wavelength are overlapped grating, Er-doped fiber, chirp grating, spectrometer and answer apparatus for adjusting force；The dual wavelength is overlapped light
The peak reflectivity of grid is above 99%, and peak wavelength is respectively λ 1 and λ 2, and the wavelength interval between two gratings is sub-nanometer
Magnitude；The chirped grating reflection wave band covers λ1To λ2, and spectrum assignment realizes wavelength X when passing through inscription1To λ2Between deposit
It is recessed in reflectivity；One end of the dual wavelength overlapping grating is connected directly with pumping source, the other end and the er-doped
Optical fiber is connected；One end of the chirp grating is connected with Er-doped fiber, and the other end is that output end is connected to spectrometer；It is described
Dual wavelength overlapping grating and the chirp grating constitute the resonant cavity of laser, which is linear cavity；Described is double
Overlapping wavelengths grating and the chirp grating realize the wavelength selection of laser；The dual wavelength overlapping grating is covered by ultraviolet
The method of film, multiple exposure is prepared on optical fiber same position；Spectrum assignment is real when the chirp grating passes through inscription
Existing wavelength X1To λ2Between there are reflectivity recess；The stress that the chirp grating is applied on chirp grating by control is adjusted
The gain in laser cavity is saved, realize the gain balance of dual wavelength and stablizes lasing；The Er-doped fiber realizes the amplification of laser；
The doping concentration and Er-doped fiber length of the Er-doped fiber are adjustable；
The chirp grating both ends are equipped with and answer apparatus for adjusting force；Connection is all made of single mode optical fiber welding between device；
The pumping source is 980nm LD, peak power output 750mW；The Er-doped fiber is high concentration er-doped light
Fibre is used as gain fibre；The optical fiber laser output spectrum minimum wavelength resolution ratio is 0.01nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510227768.7A CN104852270B (en) | 2015-05-07 | 2015-05-07 | Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510227768.7A CN104852270B (en) | 2015-05-07 | 2015-05-07 | Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating |
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| CN104852270A CN104852270A (en) | 2015-08-19 |
| CN104852270B true CN104852270B (en) | 2018-12-07 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742948A (en) * | 2016-04-29 | 2016-07-06 | 燕山大学 | Tunable fiber laser based on fiber Bragg grating |
| CN117490736A (en) * | 2018-06-04 | 2024-02-02 | 直观外科手术操作公司 | Overlapped optical fiber grating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159365A (en) * | 2007-09-27 | 2008-04-09 | 中国人民解放军空军工程大学 | Multi-path optical fiber laser coherent beam combination device and coherent beam combination method |
| CN101424771A (en) * | 2007-10-30 | 2009-05-06 | 骆飞 | Optical fiber grating tuning device and optical systems |
| CN102148472A (en) * | 2011-03-14 | 2011-08-10 | 苏州华必大激光有限公司 | Moire effect-based wavelength-tunable hybrid laser |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7627006B2 (en) * | 2003-09-18 | 2009-12-01 | Universite Laval | Multi-wavelength laser source |
| KR100628472B1 (en) * | 2004-05-24 | 2006-09-26 | 한국과학기술연구원 | Raman or erbium-doped fiber laser sensing probe based on fiber Bragg gratings fabricated with few mode fibers for applications to simultaneous measurement of strain and temperature and long-distance remote sensors |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159365A (en) * | 2007-09-27 | 2008-04-09 | 中国人民解放军空军工程大学 | Multi-path optical fiber laser coherent beam combination device and coherent beam combination method |
| CN101424771A (en) * | 2007-10-30 | 2009-05-06 | 骆飞 | Optical fiber grating tuning device and optical systems |
| CN102148472A (en) * | 2011-03-14 | 2011-08-10 | 苏州华必大激光有限公司 | Moire effect-based wavelength-tunable hybrid laser |
Non-Patent Citations (2)
| Title |
|---|
| Single-Longitudinal-Mode Dual Wavelength-Switchable Fiber Laser Based on Superposed Fiber Bragg Gratings;R. A. Pérez-Herrera等;《IEEE Photonics Journal》;20150415;第7卷(第2（2015）期);第7101307-1~7页 * |
| Single-polarization, switchable dual-wavelength erbium-doped fiber laser with two polarization-maintaining fiber Bragg gratings;Suchun Feng等;《Optics Express》;20080804;第16卷(第16（2008）期);第11830-11835页 * |
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